As an expert in the field of genetics and human biology, I can provide you with an informed answer regarding the rarest eye color in the world.
The rarest eye color is generally considered to be
green. Green eyes are the least common eye color globally, with only about 2% of the world's population having this color. The gene responsible for green eyes is a rare variant that requires both parents to carry the gene for it to be expressed in their children. This color is most commonly found in people of Celtic, Scandinavian, and some Eastern European descent.
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